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authorDaniel Lezcano <daniel.lezcano@linaro.org>2021-03-14 12:13:30 +0100
committerDaniel Lezcano <daniel.lezcano@linaro.org>2021-03-15 04:46:54 +0100
commitef37d1f9acb57b7a5993e93ae582ba5f4108919e (patch)
treea8e59b4993a6b01ee82daa91e77c8af3ac7c66e3 /drivers/thermal/cpufreq_cooling.c
parent58483761810087e5ffdf36e84ac1bf26df909097 (diff)
thermal/drivers/cpufreq_cooling: Use device name instead of auto-numbering
Currently the naming of a cooling device is just a cooling technique followed by a number. When there are multiple cooling devices using the same technique, it is impossible to clearly identify the related device as this one is just a number. For instance: thermal-cpufreq-0 thermal-cpufreq-1 etc ... The 'thermal' prefix is redundant with the subsystem namespace. This patch removes the 'thermal' prefix and changes the number by the device name. So the naming above becomes: cpufreq-cpu0 cpufreq-cpu4 etc ... Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Reviewed-by: Lukasz Luba <lukasz.luba@arm.com> Link: https://lore.kernel.org/r/20210314111333.16551-2-daniel.lezcano@linaro.org
Diffstat (limited to 'drivers/thermal/cpufreq_cooling.c')
-rw-r--r--drivers/thermal/cpufreq_cooling.c34
1 files changed, 12 insertions, 22 deletions
diff --git a/drivers/thermal/cpufreq_cooling.c b/drivers/thermal/cpufreq_cooling.c
index 10af3341e5ea..3f5f1dce1320 100644
--- a/drivers/thermal/cpufreq_cooling.c
+++ b/drivers/thermal/cpufreq_cooling.c
@@ -13,10 +13,10 @@
#include <linux/cpu.h>
#include <linux/cpufreq.h>
#include <linux/cpu_cooling.h>
+#include <linux/device.h>
#include <linux/energy_model.h>
#include <linux/err.h>
#include <linux/export.h>
-#include <linux/idr.h>
#include <linux/pm_opp.h>
#include <linux/pm_qos.h>
#include <linux/slab.h>
@@ -50,8 +50,6 @@ struct time_in_idle {
/**
* struct cpufreq_cooling_device - data for cooling device with cpufreq
- * @id: unique integer value corresponding to each cpufreq_cooling_device
- * registered.
* @last_load: load measured by the latest call to cpufreq_get_requested_power()
* @cpufreq_state: integer value representing the current state of cpufreq
* cooling devices.
@@ -69,7 +67,6 @@ struct time_in_idle {
* cpufreq_cooling_device.
*/
struct cpufreq_cooling_device {
- int id;
u32 last_load;
unsigned int cpufreq_state;
unsigned int max_level;
@@ -82,7 +79,6 @@ struct cpufreq_cooling_device {
struct freq_qos_request qos_req;
};
-static DEFINE_IDA(cpufreq_ida);
static DEFINE_MUTEX(cooling_list_lock);
static LIST_HEAD(cpufreq_cdev_list);
@@ -528,11 +524,11 @@ __cpufreq_cooling_register(struct device_node *np,
{
struct thermal_cooling_device *cdev;
struct cpufreq_cooling_device *cpufreq_cdev;
- char dev_name[THERMAL_NAME_LENGTH];
unsigned int i;
struct device *dev;
int ret;
struct thermal_cooling_device_ops *cooling_ops;
+ char *name;
dev = get_cpu_device(policy->cpu);
if (unlikely(!dev)) {
@@ -567,16 +563,6 @@ __cpufreq_cooling_register(struct device_node *np,
/* max_level is an index, not a counter */
cpufreq_cdev->max_level = i - 1;
- ret = ida_simple_get(&cpufreq_ida, 0, 0, GFP_KERNEL);
- if (ret < 0) {
- cdev = ERR_PTR(ret);
- goto free_idle_time;
- }
- cpufreq_cdev->id = ret;
-
- snprintf(dev_name, sizeof(dev_name), "thermal-cpufreq-%d",
- cpufreq_cdev->id);
-
cooling_ops = &cpufreq_cooling_ops;
#ifdef CONFIG_THERMAL_GOV_POWER_ALLOCATOR
@@ -591,7 +577,7 @@ __cpufreq_cooling_register(struct device_node *np,
pr_err("%s: unsorted frequency tables are not supported\n",
__func__);
cdev = ERR_PTR(-EINVAL);
- goto remove_ida;
+ goto free_idle_time;
}
ret = freq_qos_add_request(&policy->constraints,
@@ -601,11 +587,18 @@ __cpufreq_cooling_register(struct device_node *np,
pr_err("%s: Failed to add freq constraint (%d)\n", __func__,
ret);
cdev = ERR_PTR(ret);
- goto remove_ida;
+ goto free_idle_time;
}
- cdev = thermal_of_cooling_device_register(np, dev_name, cpufreq_cdev,
+ cdev = ERR_PTR(-ENOMEM);
+ name = kasprintf(GFP_KERNEL, "cpufreq-%s", dev_name(dev));
+ if (!name)
+ goto remove_qos_req;
+
+ cdev = thermal_of_cooling_device_register(np, name, cpufreq_cdev,
cooling_ops);
+ kfree(name);
+
if (IS_ERR(cdev))
goto remove_qos_req;
@@ -617,8 +610,6 @@ __cpufreq_cooling_register(struct device_node *np,
remove_qos_req:
freq_qos_remove_request(&cpufreq_cdev->qos_req);
-remove_ida:
- ida_simple_remove(&cpufreq_ida, cpufreq_cdev->id);
free_idle_time:
free_idle_time(cpufreq_cdev);
free_cdev:
@@ -712,7 +703,6 @@ void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev)
thermal_cooling_device_unregister(cdev);
freq_qos_remove_request(&cpufreq_cdev->qos_req);
- ida_simple_remove(&cpufreq_ida, cpufreq_cdev->id);
free_idle_time(cpufreq_cdev);
kfree(cpufreq_cdev);
}